Dividing head



Au 31, 1943. ROCH AL 2,328,346

DIVIDING HEAD 7 Filed Jan. 50, 1942 2 Sheets-Sheet 1 Hen/ y f1 rock/71a I a- 1, 1943. H. KROCHMAL 2,328,346

DIVIDING HEAD Filed Jan. 30, 1942 2 Sheets-Sheet 2 f flea/y Kroc/mm .tion and accompanying drawingslllnfwhichfl v j flFi gure l is; a fragmentary topplanview'illus- V trating a, portion of a lathe with a dividinghead This invention relate s to a dividin ilar" work, and has for .the 1 primaryitobject the itive with theieeth ot: the dividingiplater iwi withthese lend other objects in: view as i will "ceeds, the invention consistsin' certain novel tea; 7 f tureslof construction;combinationend' 'arrange"- 1 mentor sre ies S en-tie;herei after more tully described and clainiedr I I I i Fora complete understanding of my i nvention reference is to'behad to the following descrl pbecome more epparentlas the description prowlth my invention;

" a lied thereto and constructed-in accordance f 18urfei2 isfa'sectional viewtaken onthe' line 1' fl- -lotFigure 1.5 v X 5- I "Flgure 3 is a plan' view illustrating'the 11hr p fdvedydividing plate and the locklnpme'ans therefor and the association of spacing arms with e a the dividing plate.

.yFlgure 4 is a, bottom plan view showing the supporting bracket ot th e present invention; I

' t Figure 5 is a perspective view of a'securingdog. along with its attaching zportionandfinger piece; Figure 61 a perspectlve view illustrating one I ot-thespacing arms. I i f e j a If; Figure 71s a view similar. to Figure 6 showing theotherspacin'garrnL if e I g Referring in detailto the-drawings,jthenu metal 5 indicates a fragmentaryjiportionfot' the"- flatheg 6 the rails of'the Lbed or jjsaidlethe and J; the lathe spindle oniwhlch thejstock is 'mountedf 1 inthe usual way suchas eniploying'a'chuck'oi- 2. similar device. Saidpart5 of the lathe ar'em'erely a shown fragmenterilytogive understanding asto theapplicationofthepresentinvention to "this typeof machine so that gear cuttingjen cjl I I g headlesw I pecially adapted for geargcutting -fand other slin 1 blend 1 easilyland quickly edapted tothe rails of a lathe 15 -bed, a supporting bracket! isprovid'ed which "includes"afplate likeportipn 9fto5rest flatlyiupon the rallszandcarries a bolt I provided with awing i nutfl whlch bolt extends between the railssand Q jthrough aclam ing plate l2-so, thatjwhen the nut is-turned on the bolt the braeketwill befirmly I 1;; 1

.lanchoredon the lathe. I i i I outwardlviextendinkarm: -'l 3; One e d 0f l l is lbearing l5 tornledon the freeend of theerm l3. ,Thejbea'rings l4 and {I5 coactinirotatably,

,rotaupntn remtng. a

' seat 22 to be engaged bye dividing plate 23 when and has a at 2,4. n

one'of its-faces. f

eating arm's VZI and 28.

40 -most spacing carindicating forming an [integral part on mounting 32, the latter being provided with 36fan d 31 the braeke I V Imountingjoifjthe dog tohfave sliding movement deta'ehably secured to-the armsl3'of Th platte further includesian and f i tee a wlth' nm nd o the-rest orFp e SIen thetlatter adjacent itslformation ontojthe-armfi I v is provided w ithg -a{bearing l 4,- :ahgnihg with ea :WPPQIMeniene nssh w i h is-s I II II I lfllheworrnmesheswithaworm I, :gear 18 detachabl secured on the tspindl e ll for i 'l'lieI'operating shaft, G Ispr VidedLWIth-a re- I jduced serew threaddf portion", l9 {on which is t i threaded a sleeveftyp nut'2ll'providing a, seat for tone e'nd of e coil spring 2| 'I'he reduced "screw threaded portion)ladefinesaf'shoulder or mounted on thereduc'e'd serew' threadedportlon keyed connection therewith, asfishown I The dividin g plateisof 'an'irnproved forrn andj I v lncludestteeth 25 onits' periphery and-afseale on Also 'removably mounted Ion the reduced screw threaded portion l9 ofthe operating shaft [15 arej th'e overlapping hubs -26 of 'spacingor indi-" I I I Theother end of the coil spring bears agalnstfthex-hub of the outer- I t I I arm; 'Ihearm 21 is" provided with a scre'w threaded studtq on which 7 a flanged nut is turned to engage the hub of the a'rm28 wherebyfisaid arms may befreleasably se cured against movementeletive to'each other of the dividing plate jspecedopeningstiiandflto slidably receivepins V V i J The pins and 3! permit the V enatheibracket,that 15, toward and from the arm I3 of*saidbracketfor engagingend disengaging thedog 3liwlththe teeth of the dividing plateand will prevent 's'aid mou nting firem hating to each other-and'the dividing plate andwar e rotation. The mounting is spring influenced by securedagainst relative movement by the nut 24.

of the pin 35 and'th'e' mounting 32. The action 7 the pressure of the spring 21; I V V e V r of the spring is te u'rge the dog 13] intoengage 5 1 While I'have shown and. described the prement with the teeth of the holding plate to pre' {erred embodiment of my" invention, it will be Vent'said plate from aecidentally moving entof iunderstoodthat minor changes'in eonstruction, a desired adjustment. eiom bination and arrangement of partsmay be V for therotatien of theuop'erating shaft 16 and 10 scoperof thexinventionjiaselaimed; v I the rotationl'of the lattefr impartsiiotationteythe ,Having thus'de scrihedithe invention, What I worm gear. 48 for turning the stock' carried by; 1 claim-is: a I the spindle '|.of the lathe. I, Ina dividing head," an arm, a, plate integral When an{ adjustment tothe stoek isdesired; with one end of the arm and arranged angularly t i the dog is disengaged. from theteeth of thedi- -t0 arm and positioned horizontally 'on bed viding'plate by a pull on a finger piec'e Ail pro -yprails -ef'a lathe locating said arm laterally of i ment ofthe stockmay. thenbe mad by rotating wardlyifromlthe'rails', means releasablyjsecuring the operating shaft l6 by thenut 2U. Y the ,plate on the rails and for adjustment end- The sleeve typeinutl'bei ng threadedon the. -'wi'se thereof, spaced alignecl' hearings on said shaft illfiycanibexeasilyaunth'readed thetef1f0m;;t0f er x n pera n z h hm a ly pm te y permit the removal of-th'e fiivi'dingiplateifl. i This r eaid "bearings Eand :arranged :lthereby ;1 ara11el :to

sis" desirableavhenone dividingrplateisatoibe sub asaidgaim, a-di zidin p n i flflt ip stitu'ted forgangther; f 1 :4 1 v r ipheryikeyetieon;said;shaft,;a.s1eeve.typernut Kiln order =to:a.djustithe 'stoekgre'lative ato'ithe 2 'z 'remevably'imountedaonzthe shaitxancizempleyed :cutter'lefnthe i lathe ifqriiaecurately cutting :ge'ar j 1 aas'iafinger piece foriretatingathesshelitandi'beanmheriworkiitherein,eitfiistonlytneeessmzy' ing against the dividingqplate indicators iover ztolreferi tdthe divisional markings on the face 11mg the vdlivi-di rlgfzplat in 'sup imp s d 19113- i .gofi-th' div-idi ng tplatl ndlgth mb 1 5'f-t thitionfitoveachkotherz and jpui nalejd .enzthezsleeve yato' pass the catch" ciur'ing the fretation {of the typernut,awaitspri gm d n j g l eve type {dividing plate bythe nut 2ognth catcfibingfirst :nut :With acneiend bearing.xagaixistsaid nut :and

:uisengaged from' the teeth .te ment it be-ma'de anti.wi hich ith the teeth 'e'ffs ally --released 9;

. ill :autematieally -cators .to. f oreetheaeth'eriindieatbrftbgbear against 'vidingplatfag .one faceizof the dividin'g plate andiprdyidiriaa etively seeuiing yieldablei mm thetween' the zimiicators :ancl z t-he Vi I saidfli -iq plate itsnew plg qf flju tm i it I "Emit,zmeansireleasably icbnnectiz'igiithe-inidicaitirs, and th'erehy-fllee'k ing the stoek 'against accidental spaced. :pi ns secured'tn fthe vzarxn za latchrmeans m ment:w ilebeing-cut. j ,slidabletnnfsaid pins; ssp'ring me'ansf;'on' :bne'sof 'f'l-he-spacingjer indieating arms"'ar emrjlejetl 0 zs'aidl-pinsand urging-thelatch'imeansfto engage im-snag gthenumber'oiiteeth tpg a$ft eicatch the tootheiiperiphery ojftheflividing qalat'eyand I or less teeth than one eo rn'pletefrevblntion ofthe QfZ BJa hev r 1 W fqividing plate i'said'armsare adjnstable relativ ENRY K-BQICHMA a coil Spring interpes betweenflthe head 39 Their positions-on'thfe dividing plate are held. by r v i The sleevetype nut 20 provides-a finger pieCe 7 made witheut departing fromgthe spirit and Vvided on the mnunting 32' anda' desiredacijust-' thebed rails and extending upwardly and out e tct a j t v ithetet-her end ihearin glagainst one bfrtheiindi- V wheneach adjustnientgorfiivisinn-resiilt ji i drive ;means zeonnec'ting' =said' shaft'togaspirrcile 

